In the cool seasons, Navicula subminuscula, a eurythermal species, was the major dominant species, while warm water species increased rapidly with increasing air temperature.
Results show that the greenbelt is a man-made phytocommunity, with pinu massoniana and eucalyptus being the dominant species and the coverage rate over 85%.
Among them East Asian element predominated over the other elements, making up 51.35 percent of the total species ,then Oriental element occupying 25.51%, Palaearctic 18.45% and Eurytopic only 2.26%.
For the heredity of the early mature traits, the additive effect took the dominant position, but the effects of the nonadditive gene and reverse cross could not be ignored.